.box{
    width: 500px;
    height: 300px;
    position: fixed;
    left:50%;
    top:50%;
    margin-left: -250px;
    margin-top:-150px;
    border:1px solid #ccc;
    z-index: 100;
    background-color: #fff;
}
.box .box-header{
    position: relative;
    width: 100%;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background-color:maroon;
    color:#fff;
    cursor: move;
    
}
.box .box-closeBtn{
    position: absolute;
    top:0px;
    right:0px;
    cursor: pointer;
    color:#fff;
    font-size: 20px;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    /* border-radius: 50%; */
    background: blue;
}
.box .box-content{
    width: 100%;
    border-bottom: 25px;
    text-indent: 1em;
    line-height: 25px;
}
.box .box-footer{
    position:absolute;
    width: 100%;
    left:0px;
    bottom:0px;
    height: 40px;
    line-height: 40px;
    text-align: center;
}
.box .box-footer .sure{
    padding: 0px 30px;
    margin-bottom: 20px;
}
.skinClassNameA {
    width: 500px;
    height: 300px;
    position: fixed;
    left:50%;
    top:50%;
    margin-left: -250px;
    margin-top:-150px;
    border:5px solid #ccc;
}
.skinClassNameA  .box-header{
    position: relative;
    width: 100%;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background-color:orange;
    color:#fff;
    cursor: move;
}

.skinClassNameA  .box-closeBtn{
    position: absolute;
    top:-10px;
    right:-10px;
    cursor: pointer;
    color:#fff;
    font-size: 20px;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
    background:red;
}
.skinClassNameA  .box-footer .sure{
    padding: 5px 30px;
    margin-bottom: 20px;
    color: #fff;
    background: orange;
}
.mask{
 position: absolute;
 width:100%;
 height: 100%;
 opacity: .5;
 filter: alpha(opacity:50);   
 background-color: #333;
 z-index: 1;
}